All of the recent SEC investigation into stock option grant backdating started with some research done by a professor, Erik Lie, at the University of Iowa. I love it when the little guy can cause such positive change just by speaking up.
As if it weren't hard enough to predict the value of publicly traded stocks, greed and corruption have made it effectively impossible. Unless a public company complies with a base set of accounting rules (granted, many of the actual rules are flawed), there is no way to value it.
Erik's work, over time, will minimize the obfuscation that backdating causes in a publicly traded companies stock price; thanks Erik!